Rotary cutting device



Filed Oct. 18, 1923 Sept. 28 1926.

lll/lll, l l l illlllll/ Patented Sept. 28, 1926.

UNITED STATES' PATE-NT OFFICE..

WALTER G. TRAUTMAN, OF CLEVELAND, OHIO, ASSIGNOB T THEUCLEVELAND FOLD-ING MACHINE COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

ROTARY CUTTING DEVICE.

Application led October 18, 1923. `Serial No. 689,265.

My invention relates to improvements in rotary cuttingdevices andmoreparticularly to one adapted for cutting or trimming sheets of paper;the object of said invention being the provision of a flexibly mountedrotary blade adapted to conform to its co-acting blade despite slightirregularities in their respective mountings, while affording a positivedrive and attachment for the flexibly mounted cutter.

When paired co-acting rotary cutters of ordinary type are ein loyedfortrimming or cutting paper, it is requently found that their shearingcontact is im aired throughout a portion of their perip eries by reasonof slight inaccuracies in their mountings or driving shafts.Accordingly, I have devised means for correcting this defect. inoperation, while improving the operativeness of my novel device.

In the rotary cutting device of my invention one of the rotary bladesmay rigidly secured upon its drivin shaft, while the opposing blade isprovide with a'suitable spring mounting and a positive drivingconnection, although otherwise free, Within certain limits, with respectto its driving shaft. The details of my improved device and its mannerof use may best be explained by making reference to the accompanyingdrawings, wherein Figure 1 is a fragmentary view in elevation, partiallysectioned, illustrating suiiicient of the mechanism of a paper-foldingmachine for orienting the employment of my present improvements. v

Fig. 2 is a vertical section on line 2 2, Fig. 1, p

Fig. 3 is anenlarged view in transverse section illustrating the rotarycutting deice of my invention, taken on line 3 3,

Fig., 4 is a similar enlarged view of the rotary cutting device, butshown in side elevation, and

Figs. 5, 6, 7 8 and 9 are views principally in vertical cross sectionshowing the details of the flexible mounting for the blade; `the sectionof Fig. 9, however, being on the angular line 9-9, Fig. 4.

Throughout the several figures of the drawings I have employed the samecharacter of reference to indicate similar menibers or parts.

Referring first to Figs. 3 and 4, it will be seen that two rotarycutting blades a and b are operatively mounted upon' their parallelshafts (z, b', respectively; the former being rigidly held in anyadjusted position by means of the set screw c within the adjustablecollar c. Further details of mounting -are similar to those of the oposing blade,

except for its flexibility, an need not be specifically detailed. Theseveral parts or members of the ilexibly mounted cutter or blade b arewell shown in disassembled `relation in the latter figures of thedrawings; these comprising the adjustable driving collar e, itsco-acting flexible collar al connected thereto by the springs d and thelimiting drive-pins d forced within the openin e of the flexible collare. Said blade b is held rigidly on the iexible collar 'by means of thereinforcing ring f and knurled thumb nut g screwed over the threadedextremity of said flexible collar. The driving collar e 's held in itsadjusted position upon the shaft b so as to tension the springs d andforce the edge of the cutter b against its coacting cutter a inoperative relation, as best shown in Fig. 3. The preferred, employmentof my imr proved device may be explained in connection with Figs. l and2 illustrating the set of folding and bucklin rolls h, z', j, and lcassociated with the t roats of their co-acting folding platesl and m,rearwardly broken away. rom the rolls j, la, the signature is deflectedby the guide fn. to pass .between the rotary cutters ga, b respectivelymounted in opposing relation upon their driving shafts immediately abovethe transfer frame 0. These cutting blades are adjusted along theirrespective driving shafts to contact with the signatures as they comefrom the folding rolls y', lc and cut or trim the same in any desiredposition prior to their entry within the transfer frame. l

It will be appreciated that since the blade b is flexibly mounted uponits driving shaft by means of the coiled springs d', tensioned asdesired, said blade will accurately conform to the co-acting rotaryblade or cutter a rigidly mounted in opposition thereto. Moreover, theCollard is positively driven by means of the pin d, and the thumb nutmay be tightened without flexing the springs or forcing the collars dand e out of alinement, by reason of their connection through the drivepin d.

Having now described the embodiment of my invention and its applicationto one type of )aper-folding machine, I claim as new andi desire tosecure by Letters Patent, the following 1. In combination with a rotarycutter member, a co-acting resiliently mounted rotary lcutter device,peripherally engaging the former, com rising a driving shaft, a collarand threa ed sleeve-loosely mounted upon said shaft, an annular cutterblade and a securing nut mounted upon the threaded sleeve, a second oposing collar secured to rotate with the diiiving shaft, and alternatingspacing springs and drivepins resiliently connecting the first namedcollar With the latter for rotation with the driving shaft,substantially as set forth.

2. A rotary cutting device or slittingi mechanism for paper, comprisinfra collar adapted to be adjustably securedD upon its driving shaft, asecond collar facin the other and loosely mounted upon the driving*shaft, a rotary blade rigidly mounted thereon; and means for oonnectinofthe collars resiliently for actuation by the driving shaft, comprising aloosely fitted drive pin and opposing springs flexibly uniting saidcollars, substantially as set forth.

3. In combination with an independently rotated cutter, an associatedresiliently mounted cutter device peripherally engaging the former,comprising a collar, means for adjustably securing it to its drivino'shaft, a {iexibly mounted collar upon said driving shaft in oppositionto the first named collar, a rotary blade thereon, and means operativelyconnecting said collars, Vcomprising a coupling drive-pin loosely fittedwith respect to one of said collars and springs interposed between saidcollars, substantially as set forth. c

In testimony whereof I do now aix my signature.

WALTER G. TRAUTMAN.

